Maryland Electrical Utility Providers and Service Territories

Maryland's electric utility landscape is governed by a combination of state regulatory authority, federally supervised transmission systems, and franchise-based service territory boundaries that determine which company supplies electricity to any given address. Understanding the structure of this sector — who holds service territory rights, how those boundaries are drawn, and what regulatory bodies oversee rates and reliability — is essential for property owners, contractors, developers, and policy researchers operating in the state. This page maps the provider landscape, the framework governing service territory assignments, and the decision points that arise when electrical work intersects with utility infrastructure.

Definition and scope

Maryland's electricity delivery sector divides into two functional layers: electric distribution utilities, which own and operate the wires connecting homes and businesses to the grid, and electric suppliers, which sell the commodity of electricity itself under the state's restructured market. This distinction emerged from Maryland's Electric Customer Choice and Competition Act of 1999 (Maryland Code, Public Utilities Article, §§ 7-501 through 7-516), which deregulated the supply side while leaving distribution as a regulated monopoly.

The Maryland Public Service Commission (PSC) is the primary regulatory authority over electric distribution utilities. The PSC assigns exclusive service territories to each investor-owned utility and sets the rates, terms, and conditions under which distribution service is provided. The Federal Energy Regulatory Commission (FERC) holds concurrent jurisdiction over wholesale electricity transactions and transmission infrastructure under the Federal Power Act (16 U.S.C. §§ 791a–825r).

Scope of this page: Coverage applies to the State of Maryland, encompassing all 23 counties and Baltimore City. Regulatory frameworks specific to the District of Columbia, Virginia, West Virginia, Pennsylvania, or Delaware are not covered here, even where those states share transmission infrastructure with Maryland through the PJM Interconnection regional grid. Federal installations within Maryland with independently operated electrical systems fall outside this reference's scope.

For the broader regulatory framework governing electrical systems in Maryland, see Regulatory Context for Maryland Electrical Systems.

How it works

Maryland's investor-owned electric distribution utilities hold PSC-granted franchises that define exclusive geographic service territories. Within those territories, no competing distribution company may operate. Four major investor-owned utilities serve the state:

  1. Baltimore Gas and Electric Company (BGE) — Serves Baltimore City and portions of Anne Arundel, Baltimore, Carroll, Harford, Howard, and Queen Anne's Counties. BGE is a subsidiary of Exelon Corporation and is the largest electric utility in Maryland by customer count, serving approximately 1.3 million electric customers (BGE Service Territory Map, BGE.com).
  2. Pepco (Potomac Electric Power Company) — Serves Montgomery County and Prince George's County in suburban Washington, D.C. Pepco is also an Exelon subsidiary.
  3. Delmarva Power & Light Company — Serves portions of the Eastern Shore counties, including Caroline, Cecil, Dorchester, Kent, Queen Anne's (shared with BGE in areas), Somerset, Talbot, Wicomico, and Worcester Counties. Delmarva is an Exelon subsidiary operating under the Pepco Holdings umbrella.
  4. Potomac Edison (FirstEnergy) — Serves portions of Western Maryland, including Allegany, Carroll (shared), Frederick, Garrett, and Washington Counties.

In addition to these investor-owned utilities, the Southern Maryland Electric Cooperative (SMECO) serves Calvert, Charles, Prince George's, and St. Mary's Counties as a member-owned rural electric cooperative. Cooperatives are generally exempt from PSC rate regulation on the same basis as investor-owned utilities, though they remain subject to PSC jurisdiction on other service matters under Maryland law.

Service territory boundaries are formally recorded in PSC orders and utility tariff filings. When a property sits at or near a territory boundary, the PSC's tariff records — publicly accessible through the PSC's electronic filing system — govern which utility holds the franchise obligation to serve.

Maryland is part of the PJM Interconnection regional transmission organization, which coordinates bulk power system reliability across 13 states and the District of Columbia (PJM Interconnection LLC). Transmission assets within Maryland are subject to FERC oversight, not PSC rate-setting authority, which creates a bifurcated regulatory environment relevant to grid interconnection projects.

For projects involving solar generation or electric vehicle charging infrastructure that connect to the utility grid, the interconnection process is separately governed. See Maryland Solar Electrical Interconnection and Maryland EV Charging Electrical Requirements for those frameworks.

Common scenarios

New construction service connection: When a new building requires electrical service, the developer or electrical contractor submits a service application to the territory-holding utility. The utility specifies the point of delivery, metering configuration, and any required infrastructure contributions. National Electrical Code (NEC) Article 230 governs service entrance conductors on the customer side of the meter; the utility's own construction standards govern the infrastructure up to the meter. Permitting and inspection concepts for service entrance work are addressed at Maryland Electrical Inspection Process.

Utility territory disputes: When a property owner believes the wrong utility is billing for service, or when a new development falls in an ambiguous boundary zone, the PSC adjudicates service territory disputes through formal complaint proceedings under COMAR 20.25 (the PSC's procedural rules for utility cases).

Distributed generation interconnection: A property owner installing rooftop solar must execute a PSC-tariff-compliant interconnection agreement with the territory-holding distribution utility. BGE, Pepco, Delmarva, Potomac Edison, and SMECO each publish their own interconnection tariffs, which must conform to the PSC's net energy metering rules under Maryland Code, Public Utilities Article, §§ 7-306 through 7-308.

Supplier switching: Under the deregulated supply market, residential and commercial customers in Maryland may choose a competitive electricity supplier. The distribution utility continues to deliver power regardless of supplier choice; only the commodity billing relationship changes. The PSC maintains a list of licensed competitive suppliers through its Consumer Affairs Division.

Outage and reliability complaints: Service reliability obligations are enforced by the PSC under SAIDI (System Average Interruption Duration Index) and SAIFI (System Average Interruption Frequency Index) metrics. Distribution utilities file annual reliability reports with the PSC, and persistent reliability failures can trigger PSC investigations and civil penalties.

Decision boundaries

Investor-owned utility vs. cooperative: The distinction carries practical consequences for permitting and dispute resolution. Investor-owned utilities (BGE, Pepco, Delmarva, Potomac Edison) are subject to full PSC rate case authority. SMECO, as a cooperative, sets its own rates through a member board process, though it remains subject to Rural Utilities Service (RUS) loan covenants through the U.S. Department of Agriculture if it carries federal financing.

Distribution vs. transmission jurisdiction: Work that touches transmission assets (generally 69 kV and above) requires FERC authorization and coordination with PJM, not PSC approval. Work on distribution infrastructure (below 69 kV, serving end-use customers) falls under PSC and local permitting authority. Contractors working on high-voltage projects must distinguish these jurisdictional layers before scoping permit requirements.

PSC vs. county authority: The PSC governs service territory boundaries and utility rates. Local jurisdictions — county building departments and fire marshals — govern electrical permits and inspections for work on the customer side of the utility meter. These authorities operate independently; a PSC service connection approval does not substitute for a county electrical permit, and vice versa. The Maryland Electrical Authority index provides orientation across these overlapping regulatory domains.

Regulated distribution vs. competitive supply: When billing or service quality disputes arise, the relevant authority depends on which layer is at issue. Distribution service complaints go to the PSC. Competitive supplier disputes may go to the PSC's competitive supplier licensing division or, in some cases, the Maryland Attorney General's Consumer Protection Division.

Decisions about load capacity, panel upgrades, and service entrance sizing in relation to utility interconnection points are addressed at Maryland Electrical Panel Upgrades and Maryland Electrical Load Calculation Basics.

References

📜 3 regulatory citations referenced  ·  ✅ Citations verified Feb 28, 2026  ·  View update log

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